Method for control of a proportional magnet with a hold function

US6891710B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Karlheinz Mayr · Zell im Wiesental, DE
• Markus Eisele · Friedrichshafen, DE
• Robert Ingenbleek · Kreßbronn, DE
• Walter Kill · Friedrichshafen, DE
• Hubert Remmlinger · Friedrichshafen, DE
• Jochen Fischer · Whitehall, US
• Bernd Fessler · Kreßbronn, DE

Key dates

• Filing date: Jan 23, 2001
• Grant date: May 10, 2005
• Expiry date: Oct 21, 2021

Classification

• Technology area (CPC G): Physics
• CPC primary: G05D16/2024
• WIPO field: Control
• WIPO sector: Instruments

Abstract

Method for control of a proportional magnet comprising a magnet core, a magnet armature, a magnet coil for operating a control element in a shift valve or a proportional pressure-control valve, particularly a pressure-control valve for clutch operation in an automatic motor vehicle transmission, and comprising an electronic control device, whereby the magnet core may be moved back and forth between a control region and a hold region with a magnetic hold position of the magnet armature and a defined transition from the control region to the hold position may be executed and whereby mechanisms are provided for recognition of the movements of the magnet armature.